English
Español
中文简体With the continuous expansion of the application scope of various polymer materials, Plastic Reagent Bottle has gradually been widely used in the storage of chemical reagents. Among the raw materials for the production of plastic reagent bottles, polypropylene (PP) and high-density polyethylene (HDPE) are two commonly used materials. What is the difference in performance between these two materials?
1. Withstand the temperature
The embrittlement temperature of HDPE is -100 °C, and the embrittlement temperature of PP is 0 °C. Therefore, when the product needs to be stored at low temperatures, more reagent bottles made of HDPE material are selected, such as the 2-8 °C buffer used for storage in diagnostic reagents. Buffer and -20 ℃ enzyme reagent bottles; for products that need to be used at high temperatures, choose PP material.
2. Chemical resistance:
Reagent bottles made of HDPE and PP are both resistant to acid and alkali at room temperature, but HDPE is superior to PP in terms of oxidation resistance. Therefore, when storing oxidative materials, use HDPE bottles; low molecular weight aliphatic hydrocarbons, Aromatic hydrocarbons, and chlorinated hydrocarbons can soften and swell polypropylene, so when storing organic solvents such as benzene rings, n-hexane, and chlorinated hydrocarbons, HDPE plastic reagent bottles should be used.
3. Toughness and impact resistance:
Polypropylene (PP) has excellent flexural fatigue resistance but poor impact resistance at low temperatures. However, the drop resistance of the HDPE material reagent bottle is much better than that of the PP material reagent bottle, so it is not suitable to use the PP material bottle for low-temperature storage.
4. Transparency:
Compared with HDPE, PP is more transparent, which is more conducive to observing the state of the materials stored in the bottle. However, the most transparent PP bottles currently on the market are all made with a transparent agent, so you need to pay attention when choosing PP material reagent bottles.
5. Sterilization method:
The only difference between HDPE and PP in the sterilization method is that PP can be sterilized by high temperature and high pressure, while HDPE cannot. Both can be sterilized by EO, radiation sterilization (irradiation-resistant PP is required, otherwise it will turn yellow), and disinfection. agent sterilization. Whether it is a reagent bottle made of PP or a reagent bottle made of HDPE, there are suitable types of chemical reagents according to the characteristics of the material. When selecting reagent bottles, the physical properties of chemical reagents should be considered.
